Utility July 13, 2026 · 8 Min Read

Work Days Calculator – Guide & Formulas

Calculate total work days, hours, and billable earnings based on custom weekly shifts, hourly rates, and time spans.

Designed for independent contractors, freelancers, and hourly employees, this Work Days Calculator goes beyond simple business day counts. It lets you customize your workweek, set your shift hours, input your hourly rate, and compute both total work days and estimated gross billable earnings.

Key Takeaway

Use the free Work Days Calculator to calculate total work days, hours, and billable earnings based on custom weekly shifts, hourly rates, and time spans. Get instant results with step-by-step explanations.

How to Use the Work Days Calculator

  1. Choose start and end dates for your working block.
  2. Check off which days of the week you actively work (e.g., Mon-Thu).
  3. Input daily work hours and your hourly pay rate.
  4. Instantly see total work days, cumulative hours worked, and projected earnings.

The Formula

Total Hours = Work Days * Daily Hours | Earnings = Total Hours * Hourly Rate

Variable Definitions

  • Work Days: The total count of active calendar days matching your shift schedule
  • Hourly Rate: Your monetary payment per hour of labor

Calculating Freelance Earnings for a Project

A developer works Monday, Wednesday, and Friday, 6 hours per day, at $50/hour, from July 1 to July 31, 2026.

  1. Step 1: Set range July 1 to July 31, 2026.
  2. Step 2: Select Monday, Wednesday, Friday as workdays.
  3. Step 3: Count shows 14 active workdays in July matching that pattern.
  4. Step 4: Total hours = 14 * 6 = 84 hours.
  5. Step 5: Earnings = 84 * $50 = $4,200.

Frequently Asked Questions

Can I use this for non-traditional workweeks?

Yes. You can select any combination of workdays (e.g., weekends only, 4-day workweeks, or specific individual weekdays) to match your custom shift patterns.